Twyer



IMM/@hf NAPEIERS, PHOTO-mHoGRAPMER, WASHINGTON. D C.

UNITED STATES PATENT FFICE.

MARVIN MEAD, OF BEDFORD, MICHIGAN.

TWYER.

` Specification of Letters Patent No. 28,680, dated J une I2, 1860.

To all whom it may cof/wem:

Be it known that I, MARVIN MEAD, of Bedford, in the county of Calhoun and State of Michigan, have invented certain new and useful Improvements in Twyers for Furnaces, &c.; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings and to the letters of reference marked thereon.

The arrangement and construction of the several parts of this twyer is what my invention consists in.

In the annexed drawings Figure 1 represents a plan view with one side removed. Fig. 3 represents a section. Fig. 2, is a perspective view.

In the drawings A, represents the body of the twyer which is made in the shape represented in the figures. A division passes around through the body or case A, as seen in Fig. 1, and forms a water passage C. Between the two sides of this water passage is an air passage D. In the circular portion of the body an annular opening is made, the metal around the opening being turned downward in the body, so as to form a flange, as seen in Fig. 2. In this flange are apertures, or air openings, through which the air passes to the re.

B, represents a disk which is made to t snugly in the opening in the body and which is provided with ears c, c, c. The ears on the disk are made to t and slide backward and forward as the disk is turned, in the air opening in the ange. The points of the ears are turned slightly inward-toward the center of the disk, so that the air will be given a whirl as it passes through the air openings.

H, represents a shaft which is secured to the disk, and which serves to turn said disk and thus open and close the air passages when necessary.

I, I, are water pipes one of which leads water into the passages C, C, and the other leads it or the steam into which it is con-v verted, out again. The water thus passed into and through the body or case serves to keep it cool, and to preserve it from injury by the fire. The air passes in through the passage D, between the water passages and thence to the re through the openings in the flange in greater or smaller quantities as may be desired.

I do not claim the use of water for cooling twyers as I am aware that it has been used before, but

Havin thus fully described my invention what I c aim as new, and desire to secure by Letters Patent, is-

The arrangement with the case, A, of the water passages C, C, the air passage D, and the disk B, as constructed, the water being made to pass on two sides of the air passage, and entirely around the case, as is represented, the several parts being connected constructed and used substantially as and for the purpose specified.

MARVIN MEAD.

Witnesses SAMUEL Coon, LEVI MERHER. 

